Ventilating device



April 23, 931.

Filed March 30. 1929 2 Sheets-Sheet 1 i r I Y INVENTOR fhzrzkaf'erzzsfrum ATTORNEYS April 28, 1931. F. o. FERNSTRUM 1,802,642

VENTILATING DEVICE Filed March 30. 1929 2 Sheets-Sheet 2 INVENTOR Frank 17. Fwnsir'ztm ATTORNEYS Patented Apr. 28, 1931 NE'I'ED STATES PATENT oFFicE FRANK O. FER-NS'IRUM, OF DETROIT, MICHIGAN, ASSIGNOR TO GRAY MARINE MOTOR COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN VENTILATING DEVICE Application filed March 30, 1929. Serial No. 351,303.

The present invention pertains to a novel air are readily withdrawn therefrom, thereby setting up a circulation of air in the compartments.

In the accomplishment of these objects the invention consists in the application of a blower to the crank shaft of the engine. In order that the blower and the parts associated therewith shall not require any considerable extra space in the engine compartment, the flywheel on the crank shaft is made hollow, and the blower is mounted on an ex-i tension of the crank shaft secured to the fiywheel and disposed in the cavity thereof. A

portion of the blower casing is contained in the same cavity, while another portion pro-I trudes somewhat forwardly of the usual enclosure for the flywheel. The protruding part of the blower casing is formed with a central aperture into which the crank shaft may be extended for attachment to a crank sleeve secured in the above mentioned extension.= The protruding part of the blower casing has a series of intake apertures, one

of which ventilates the engine compartment while the remaining apertures constitute the connections for lines running to various remote compartments to be ventilated.

The invention is fully disclosed by way of example in the following description and in the accompanying drawing, in which- Figure 1 is a front elevation of an engine equipped with the invention;

Fig. 2 is a section on the line 22 of Figure 1;

Fig. 3 is a cross section of the blower cover plate; and

, Fig. 4: is an elevation of the-blower housing.

Reference to these views will now be made by use of like characters which are employed to designate corresponding parts throughout.

In Figures 1 and 2, numeral 1 designates an air tight crank case or a separate casing for the flywheel of an engine. The engine proper is not shown, inasmuch as it does not constitute a part of the invention, but the forward end of the crank shaft is designated by the numeral 9. and is shown to be provided with a flange or collar 3. The flywheel 4, which is of a dished or hollow construction, is secured to the collar 3 by means of a flanged boss 5 engaging the bottom of the cavity and by bolt and nut devices 6 which clamp the member 5 against the flywheel.

The boss 5 receives one end of a stub shaft or extension 7 secured by a key 8, so that there is no relative rotation between the extension and the boss. On the extension is mounted a blower rotor 9 of the Sirrocco type by means of a set screw 10. This member is well known in the art and therefore requires no detailed description other than that the blades 11 thereof discharge air or gas through the periphery.

In order to support a casing for the blower, there is provided a flat steel plate 12 suitably secured to the front end of the casing 1 to constitute the front wall thereof. The

j blower housing member 13 is suitably secured. to the inner face of the plate 12 and disposed within the cavity of the flywheel 4. The face 14 of this member, in contact with or adjacent the plate 12, is formed as a spiral orhelicalplate gradually increasing in width outwardly and extending through approximately 360. The peripheral wall 15 is formed at the outer edge of the portion 14, and the two ends thereof are joined by a curved wall 16 as shown more clearly in Figure 4. At the inner edge of the portion 14 t is formed a bolting ring 17 provided with a mouth ring 18 at the space between the ends of the helical wall 15. The rear wall 19 of the housing has an aperture 20 of larger diameter than the blower 9 for assembly purposes. Bolts 21 pass through the ring 17 and plate 12 to hold these parts together.

The blower casing further includes a cover plate secured to the outer face of the plate 12 and including a conical wall 22 having at its base a flange 23 held by the bolts 21. The plate has also an exhaust passage or duct 24 communicating with the opening within the ring 18 through a properly shaped port 25 in the plate 12. It will also be seen in this connection that the plate 12 further has a central opening 26 adjacent the intake side of the blower 11 and of slightly larger diameter in order to permit free communication be tween the cover and the blower. The cover plate further has anurnber of radial ducts 27 and a longitudinal port 28 which must be so formed because of its proximity to the duct 24, where a radial duct could not be made,

To the forward extremity .of the stub shaft ,7 is secured a crank sleeve 29 extending towards the central openingBO in the cover plate. Into this sleeve may be inserted one end of a crank 31 which carries a toothed collar 32 adapted to engage the correspondingly shaped forward end 33 of the sleeve 29 for cranking the engine in the usual manner.

In the operation of the device, air and gas are drawn through the openings 27 28 and 30 by means of the blower 9 and discharged through the ring 18 and duct 24. Inasmuch as the crank case is air tight, the opening 20 which is provided merely for purposes of assembly is ineffective. The engine compartment is ventilated through the opening 30 and other openings 27 and 28 that are permitted to communicate with the engine compartment. Other openings 27 or 28 may receive pipes or lines extended to other compartments where ventilation is desired. It will be apparent that by means of this apparatus it is possible to ventilate the various compartments and also prevent accumulation of objectionable gases in various parts of the vessel, so that explosions resulting from such accumulation are avoided.

Although a specific embodiment of the invention has been illustrated and described, it vill be understood that various alterations n the details of construction may be made wa thcut .departing from the scope of the inyent1on,.as indicated by the appended claims.

W a ni m S- Incombination with a motor having a crank casing and a flywheel having a cavit V a blower rotor secured to and substantially withinsaid cavity, and a rotor casing enclosing said rotor andphaving intake and exhaust mea combination with a motor having a crank casing and a flywheel having a cavity,

a .blower rotor secured to and substantially Wi hin an s r y, a ng n os ng s ywheel, a blower housing secured to said casing and having exhaust means, and a blower cover secured to said casing exteriorly thereof and having intake means and an exhaust duct communicating with said exhaust means.

3. In combination with a motor having a crank casing and a flywheel having a cavity, a blower rotor secured to and substantially within said cavity, a rotor casing enclosing said rotor and having intake and exhaust means, said casing having an opening in its forward side, concentric with said crank shaft, an extension from said crank shaft, and a crank Sleeve secured to said extension and adapted for engagement by a crank through said opening.

,4. In combination with .a motor having a crank casing and a flywheel havlng a cavity, a blower rotor secured to and substantlally within said cavity, a casing enclosing said duct communicating wit-h said ex-haustmeans,

said cover having an opening in its forward side, concentric with said crank shaft, an extension from said crank shaft, and a crank sleeve secured to said extension and adapted for engagement by a crank through said opening.

5. In combination with a motor having a crank shaft and a flywheel thereon, a stub shaft secured to said flywheel in line with said crank shaft, a blower rotor on said stub shaft, a rotor casing enclosing said rotor, said casing having intake and exhaust means and an opening in its forward side, concentrio with said crank shaft, a crank sleeve secured to said extension and adapted for engagement by a crank through said openin 6. In combination with a motor having a crank shaft and a flywheel thereon having a cavity, a stub shaft secured to said flywheel in line with said crank shaft, a blower rotor on said stub shaft and substantially within said cavity, a rotor casing enclosing said rotor, said casing having intake .and exhaust means and an .opening in its forward side, concentric with said crank shaft, and a crank sleeve secured to said extension and adapted for engagement by a crank through said opening.

7. In combination with a motor having a I crank shaft and a flywheel thereon, a stub shaft secured to said flywheel in line with said crank shaft, a blower rotor on said stub shaft, a casing enclosing said flywheel, a

rotor casing secured to said casing, said casing having intake and exhaust means and an opening in its forward side, concentric with said crank shaft, a crank sleeve secured to said extension and adapted for engagement by a crank through said opening.

8. In combination with a motor having a crank shaft and a flywheel thereon having a cavity, a stub shaft secured to said flywheel in line with said crank shaft, a blower rotor on said stub shaft and substantially within said cavity, a casing enclosing said flywheel, a blower housing secured to said casing and having exhaust means, a blower cover secured to said casing exteriorly thereof, said cover having intake means, an exhaust duct communicating With said exhaust means, and an opening concentric with said stub shaft, and a crank sleeve secured to said stub shaft and adapted for engagement by a crank through said opening.

In testimony whereof I affix my signature.

FRANK O. FERNSTRUM. 

